geology The ocean's salt could blanket the Earth's land surface in a whopping 500-foot layer Mark Frauenfelder
History Why did Mark Twain hate coyotes? What is the difference between an Opossum and a Possum? Elías Villoro
politics Most Americans are not confident election systems are secure from hacking: Pew Research Xeni Jardin
scholarship Mexico-US illegal migration has been at zero for 8 years, and other eye-opening facts Cory Doctorow
Science Cocktail party science: Day 3 at AAAS 2012 (+ our short video interviews with science writers!) Maggie Koerth